Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleGeographical Distribution of Variability in the Yields of Field Crops in the States of the Mississippi Valley.AuthorsKlages, K. H.PublicationEcology, 1930, Vol 11, Issue 2, p293ISSN0012-9658Publication typeArticleDOI10.2307/1930265